还原温度对NiO/ZnO-TiO2吸附剂脱硫性能的影响  

Effect of reduction temperature on adsorption desulfurization performance of NiO/ZnO-TiO2 adsorbent

作　　者：龚学成 李芹[1] 田凯歌 姜伟丽[1] 周广林[1,2] Gong Xuecheng;Li Qin;Tian Kaige;Jiang Weili;Zhou Guanglin(College of New Energy and Materials,China University of Petroleum(Beijing),Beijing 102249,China;Beijing Key Laboratory of Biogas High-Value Utilization,China University of Petroleum(Beijing),Beijing 102249,China)

机构地区：[1]中国石油大学(北京)新能源与材料学院,北京102249 [2]中国石油大学(北京)生物燃气高值利用北京市重点实验室,北京102249

出　　处：《石油化工》2020年第11期1062-1067,共6页Petrochemical Technology

基　　金：中国石油天然气集团有限公司-中国石油大学(北京)战略合作科技专项(ZLZX2020-04)。

摘　　要：采用混捏法制备了NiO/ZnO-TiO2汽油脱硫吸附剂,以催化裂化轻汽油为原料,考察了还原温度对NiO/ZnO-TiO2吸附剂的吸附脱硫性能的影响,并采用XRD、压汞、H2-TPR等方法对吸附剂结构和性质进行了表征。实验结果表明,混捏法制备的NiO/ZnO-TiO2吸附剂经还原后有利于提高吸附剂的脱硫性能,适宜的还原温度为350℃,较低的还原温度会使吸附剂还原不充分,较高的还原温度会导致Ni-Zn合金的形成。在反应温度340℃、反应压力0.6 MPa、液态空速5 h^-1、氢油体积比25的条件下,NiO/ZnO-TiO2吸附剂能够将催化裂化轻汽油中硫含量由500μg/g降低至5μg/g以下,350℃还原的吸附剂的穿透硫容达到5.44%。NiO/ZnO-TiO2 gasoline desulfurization adsorbent was prepared by the kneading method.The effect of reduction temperature on the desulfurization performance of NiO/ZnO-TiO2 adsorbent was investigated by using FCC light gasoline as feedstock.Besides,the structure of the adsorbents was characterized by XRD,mercury intrusion,and H2-TPR.The result shows that reduction is beneficial to improve the desulfurization performance of the NiO/ZnO-TiO2 adsorbent.The optimal reduction temperature of the adsorbent is 350℃.Lower reduction temperature would result in an insufficient reduction of the active sites,while the higher reduction temperature would lead to the formation of Ni-Zn alloy.The adsorbent could remove the sulfide in the FCC light gasoline from 500μg/g to below 5μg/g under the following reaction conditions:340℃,0.6 MPa,LHSV 5 h^-1,H2/oil volume ratio 25.The penetrating sulfur capacity of the adsorbent reduced at 350℃is 5.44%.

关 键 词：催化裂化轻汽油 还原温度 Ni-Zn合金 吸附脱硫 

分 类 号：TQ203.2[化学工程—有机化工]